啤酒大麦不同品种的吸肥特点以及产量和品质比较

Comparison of N,P and K Absorption characteristice, Grain Yields and Qualities between Four Malting Barley Cultivars

本文研究比较了四个啤酒大麦品种的吸肥特点、产量及品质。结果表明:氮、磷、钾的吸收量,因品种和产量水平不同而不同,通麦5号磷、钾的吸收量相对较少而产量较高,说明其养分利用率高。拔节前N、P_2O_5、K_2O的吸收量分别占总吸收量的48.6～57.9％、26.7～32.0％和50.6～67.2％,由此可见,基肥的重要性。氮、磷、钾的吸收强度均以拔节期至齐穗期为最强。在拔节期约80％左右的养分都集中在叶和叶鞘中,以后逐渐向茎和穗部转移,至成热期,大多数氮和磷转移到籽粒,但多数钾仍滞留在茎杆中。品质分析表明矮早三和通麦5号能达到啤酒工业酿造要求。

This paper dealed with the characteristics of N, P and K absorption, grainyields and qualities of four malting barley cultivars. Results showed that theamounts of N, P and K uptaken by the barley plants varied with differentcultivars and grain yields. However, Tongmai 5 had a less P and K uptakesbut a higher grain yield indicating a more efficent utilization of nutrients. Based on the total uptakes, 48.6--57.9% of N, 26.7--32.0% of P_2O_5 and50.9--67.2% of K_2O wasrespectively uptaken by the plants before jointinggstage. The highest absorption intensity occured from jointing to fully headin At jointing stage, about 80% of the total N, P and K uptaken was distri-buted in leaves and sheathes. Afterwards, the nutrients were gradually tran-sported to stems and ears. And finally, most N and P were concentrated in grainswhile most K remained in stems. It was further concluded from quality analysie thst cultivars Aizha 3 andTongmai 5 could meet the demands of brewing in beer-making industry.